Nanomsg简介

nanomsg是一个socket library，提供了几种常见的通讯模式，目前可用可扩展的协议有:

PAIR 一对一

BUS 多对多

REQREP 允许构建无状态服务集群来处理用户请求

PUBSUB 将消息发给订阅消息的用户

PIPELINE 汇总来自多个来源的消息，并在目的点之间负载均衡。

SURVEY 允许一次查询多个应用程序的状态

Nanomsg订阅发布使用示例

C#中使用Nanomsg非常方便，只需要NuGet里面查找Nanomsg，选择合适版本安装即可，这里选择的是NNanomsg,

版本是0.5.2.使用起来非常简单

需要server发布信息，client订阅信息。

nanomsg使用进程间通信，server端只需要bind某个地址即可，然后通过PublishSocket send数据就可以了，

而client端通过SubscribeSocket订阅一个或者多个topic，然后connect通讯地址，通过Receive接收数据即可。

Nanomsg是将topic和消息连接在一起，只需要client订阅的topic和整个消息的前面部分一致就可以收到数据。

实际代码如下：

server端：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using NNanomsg.Protocols;

namespace WPFNanoMsgServer
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        PublishSocket serversocket = new PublishSocket();
        string address;

        public MainWindow()
        {
            InitializeComponent();
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            //获取参数并启动
            serversocket.Bind(textBox_address.Text);
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            string topic = textBox_topic.Text;
            string content = textBox_content.Text;
            string message = topic + "|" + content;
            byte[] b = Encoding.UTF8.GetBytes(message);
            serversocket.Send(b);
            if(textBlock_log.Text.Count()>5000)
            {
                textBlock_log.Text = "";
            }
            textBlock_log.Text ="publish msg:"+ message + "\n" + textBlock_log.Text;
        }
    }
}

对应的UI xaml 内容如下：

<Window x:Class="WPFNanoMsgServer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPFNanoMsgServer"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button x:Name="button" Content="启动" HorizontalAlignment="Left" Height="26" Margin="429,20,0,0" VerticalAlignment="Top" Width="56" Click="button_Click"/>
        <TextBox x:Name="textBox_address" HorizontalAlignment="Left" Height="26" Margin="47,20,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="82"/>
        <TextBlock x:Name="textBlock_log" HorizontalAlignment="Left" Height="208" Margin="35,90,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="229"/>
        <Label x:Name="label" Content="log" HorizontalAlignment="Left" Height="25" Margin="35,60,0,0" VerticalAlignment="Top" Width="66"/>

        <Button x:Name="button1" Content="发布" HorizontalAlignment="Left" Height="26" Margin="320,105,0,0" VerticalAlignment="Top" Width="58" Click="button1_Click"/>
        <TextBox x:Name="textBox_topic" HorizontalAlignment="Left" Height="27" Margin="309,131,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="169"/>
        <TextBox x:Name="textBox_content" HorizontalAlignment="Left" Height="102" Margin="309,170,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="169"/>

    </Grid>
</Window>

client端代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
using NNanomsg.Protocols;

namespace WPFNanoMsgClient
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        DispatcherTimer timer;
        static string log = "";
        void UpdateLog(object sender, EventArgs e)
        {
            textBlock_log.Text = log;
        }
        void StartTimer()
        {
            timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromMilliseconds(200);
            timer.Tick += UpdateLog;
            timer.Start();
        }
        public MainWindow()
        {
            InitializeComponent();
            StartTimer();
        }

        bool runFlag = false;
        static string topicstr;
        static string serveraddress;

        public static void DealReceive()
        {
           
        }
        static  void DealReceivedata()
        {
            //await Task.Run({
            //});
            using (var s = new SubscribeSocket())
            {
                //Needs to match the first portion of the message being received.

                //需要订阅多个数据
                //string topicstr = textBox_topic.Text;
                string[] topics = topicstr.Split('#');
                foreach (var singletopin in topics)
                {
                    s.Subscribe(singletopin);
                }


                s.Connect(serveraddress);
                while (true)
                {
                    byte[] b = s.Receive();
                    if (b != null)
                    {
                        Console.WriteLine("Received: " + Encoding.ASCII.GetString(b));
                        if (log.Count() > 500)
                        {
                            log = "";
                        }
                        else
                        {
                            log = "received:" + Encoding.UTF8.GetString(b) + "\n" + log;
                        }
                    }
                    else
                    {
                        Console.WriteLine("x");
                    }
                }
            }
        }

        Thread th = new Thread(DealReceivedata);
        private void button_Click(object sender, RoutedEventArgs e)
        {
            topicstr = textBox_topic.Text;
            serveraddress = textBox_address.Text;
            if(runFlag)
            {
                th.Abort();                
            }
            else
            {
                th.Start();
            }
            runFlag = !runFlag;
                 
        }
    }
}

UI xaml:

<Window x:Class="WPFNanoMsgClient.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPFNanoMsgClient"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <TextBox x:Name="textBox_address" HorizontalAlignment="Left" Height="21" Margin="32,19,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="128"/>
        <TextBox x:Name="textBox_topic" HorizontalAlignment="Left" Height="21" Margin="32,51,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="463"/>
        <TextBlock x:Name="textBlock_log" HorizontalAlignment="Left" Height="207" Margin="32,85,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="463"/>
        <Button x:Name="button" Content="订阅" HorizontalAlignment="Left" Height="34" Margin="394,6,0,0" VerticalAlignment="Top" Width="95" Click="button_Click"/>

    </Grid>
</Window>

参考资料

https://blog.csdn.net/u012635648/article/details/78665680

C#Nanomsg订阅发布